A paper plant is being proposed for a location 1 km upwind from a town. It will emit 40 g/s of hydrogen sulfide, which has an odor threshold of about 0.1 mg/m³. Winds at the stack may vary from 4 to 10 m/s blowing toward the town. What minimum stack height should be used to assure concentrations are nor more than 0.1 times the odor threshold at the near edge of town on a class B day? To be conservative, the stack will be designed assuming no plume rise. If the town extends beyond the 1-km distance, will any buildings experience higher concentrations than a residence at the boundary under these conditions?

A paper plant is being proposed for a location 1 km upwind from a town. It will emit 40 g/s of hydrogen sulfide, which has an odor threshold of about 0.1 mg/m³. Winds at the stack may vary from 4 to 10 m/s blowing toward the town. What minimum stack height should be used to assure concentrations are nor more than 0.1 times the odor threshold at the near edge of town on a class B day? To be conservative, the stack will be designed assuming no plume rise. If the town extends beyond the 1-km distance, will any buildings experience higher concentrations than a residence at the boundary under these conditions?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A smokestack emits pollutant Z into the air on a sunny day. The effective stack height is 270 m. The wind speed is 4 m/s, due east. Your house is located 4.0 km due east of the smokestack. The ground level concentration of pollutant A is 2.0 mg/m3at your house. Your friend lives 4.0 km east and 1.5 km south of the smokestack. a. What is the emission rate of the pollutant in kg/s? b. For the emission rate determined in part a, you now want to know the concentration of pollutant Z at ground level at your friend’s house. i. What parameters change in the dispersion modeling equation? For each parameter, include the parameter symbol, a definition of the parameter, and its new quantitative value and required units.ii. Is the concentration at your friend’s house lower, the same or higher than the concentration at your house and why? (you do not need to calculate the concentration) show all work
9. Consider the NOx emissions from two rural sources. The second source is located 500 m south and 500 m east of the first source. Source 1 emits 20.5 g/s and has an effective height of 100 m. Source 2 emits 35 g/s and has an effective height of 150 m. Sketch the locations of the stacks and the receptor site. Determine the concentration at a receptor located 4 km east and 200 m south of source one. Atmospheric conditions are neutral with a westerly wind of 5 m/s measured at 10 m.
A paper plant is proposed for a location 1 km upwind from a town. It will emit 40 g/s of hydrogen sulfide, which has an odor threshold of about 0.1 mg/m3. Assume that winds at 10 m above ground are 2.5 m/s, and at the effective stack height they typically vary from 4 – 10 m/s blowing toward the town. If it is summer day with a few broken clouds, What stack height should be used to assure concentrations are no more than 0.1 times the odor threshold at the near edge of town (1 km away)? To be conservative, the stack will be designed assuming no plume rise. Will any buildings (e.g., the country cabin or the doghouse on the far edge of town) experience higher concentrations than a residence at the 1 km boundary? Briefly explain your answer.
70 m^3 of air flows in an intake airway towards a working section. Before entering the working section 10 m^3/s is drawn off and passed through a filter leaving with a dust concentration of 120p/ml. 50 m^3 is passed through a bulk air cooler leaving with a dust concentration of 100 p/ml. After the remixing of the air streams and before the air enters the working section,the dust count of the mixture is 130p/ml. Calculate the dust concentration of the original 70 m^3/s.
A new municipal waste combustor burns 300 tons/day of waste and produces 100 dscf of emissions per lb of waste burned. The plant just meets the NSPS emission standards and has an effective stack height of 100 m and is located in a rural area. Under C stability and a windspeed of 4 m/s measured at 10 m, determine Cmax and xmax for (a) PM, (b) Pb in micrograms per cubic meter, and m, respectively
An industrial plant emits lead at 300 g/s from a 50 m high stack at 300°C with a stack velocity of 12 m/s. The stack diameter is 2 m. The wind speed is 5.0 m/s, the air temperature is 10°C, the atmospheric stability class is C, and the atmospheric pressure of 102 kPa. What is the effective stack height?
Question - There is a small spill of a toxic material on a paved surface of a chemical plant. This spill has width 0.8 ft and a length of 2.5 ft. The wind is a 10 miles per hour in the direction parallel to the length of the spill. Estimate the rate of evaporation in grams per hour. There is no toxin in the air at time 0 and at infinite distance from the spill. Assume air to behave as an ideal gas. Assume the toxic material can be considered an ideal solution with psat = 22 mmHg. MWtoxin = 164.4 g/mol, Ptoxin =1.69 g/cm³, Pair = .001225 g/cm³, Hair= 0.0187 CP, MWair = 28.9 g/mol, Dtoxin,air = 0.0888 cm²/s.
5) Explain the meaning of CEM II/B – W 42.5 R and CEM III/A-32.5 N. Which one has higher clinker content?
Be accurate and timely.
The absolute viscosity of the peanut oil is 41x10-3 Pa-s and the specific gravity is 0.95. If the discharge is 8.6 L/s, what is the associated Reynolds number at the throat of the Venturi meter for a throat diameter of 51 mm?
Design a rapid mono-media sand filter for a plant that has a design flow rate of 120 MGD. Filter Boxes Required:a) How many filter boxes are required for “on-line” filters?b) How many additional filter boxes are required to accommodate “off-line”filters?c) What is the total number of filter boxes needed by your plant?